Starting device for engines



J. DUQUETTE. STARTING DEVICE FOR ENGINES. APPLICATION FILED JUNE 2, 1919.

1,356,856,, Patented Oct. 26, 1920.

2 SHEETSSHEET I- J. DUQUETTE.

STARTING DEVICE FOR ENGINES.

APPLICATION FILED JUNE 2, 1919.

1,356,85 Patented Oct. 26,1920.

. 2 SHEETS-SHEET 2- m I r I I I V M} II 4 6 Fl 5-3.; 9 A;

on the starting shaft.

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JULIE N DUQUETTE, OF SPRINGFIELD, MASSACHUSETTS.

Application filed June 2,-1919.

T 0 all 10 710m it may concern:

7 Be it known that I, JULIEN DUQUETTE, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Starting Devices for Engines, of which the following is a specification.

This invention relates to devices for start-I ing internal combustion engines such as used on motor cars; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed whereby the danger of accidents to the per-' sons who undertake to start'the engine, by cranking it, is obviated.

In the drawings, Figure 1 is aplan view of 'a starting device constructed according to this invention, and showing its main clutches disengaged. Fig. 2 is a front view of the device showing thestarting shaft in crosssection on the line 22 in Fig. 1. Fig. 3 is a sectional plan view, taken on' the line 3'3 in Fig. 2, and showing the main clutches engaged for starting the engine. Fig. 4: is a detail view of the disengaging clutch teeth and the ratchet toothed wheel. Fig. 5 is a front view of the same, showing also the main clutch member on the engine shaft.-

Jig. 6 is a. rear view of the clutch members A frame 7 is provided of any suitable construction for supportlng the parts, and it has a bearing 8 in which the engine shaft 9 is journaled, and a bearing 10 in which the starting shaft 12 is journaled; These two shafts 9, and 12 are arranged in line with The engine shaft is prevented each other. from sliding backwardly in its bearing'by means of a collar 1a, and a main toothed.

clutch member 15 is secured on its front end portion. The teeth of this main clutch mem- 7 her have radial faces and inclined flanks, like the teeth of a ratchet wheel.

The clutch member 15 is formed on a belt pulley or cylinder 16 which may be used for driving a fan or for any other purpose, and this cylinder has a circumferential rib 17 at its front side, and an annular bearing 18 which projects forwardly of and around the toothed clutch member 15.

A sleeve 20 is j ournaled loosely on the an nular bearing 18, and is provided with a ratchet toothed wheel 21 at its rear part, and two long forwardly projecting clutch teeth 22 at its front part. The clutch teeth 22 are Specification of Letters Patent.

Patented Oct. 26, 1920;

Serial No. 301.189.

also ratchet shaped teeth, and they have stops 24 at their front ends or points.

The sleeve 20 is journaled on the bearing 18 and in a housing or stationary support 25, whlch has also a bearing 26 in which the rib 17 1s ournaled. This houslng overlaps the teeth of the ratchet wheel 21 and preserves them from injury. The housing or support 25 is secured to the supporting frame 7 by arms 26, or in any other approved manner. Two similar pawls 27 are pivoted on pins 28 in recesses 29 in the housing, and these paWls engage with the teeth of the ratchet wheel 21 and permit it to revolve in the direction of-the curved arrow, ,but not in the reverse" direction. v

Two pawls are preferably provided, but more or less than two pawls might be used. The pawls are held in engagement with the teeth by springs 30. v

The starting shaft 12 has a main toothed clutch member 32 secured on its front end portion, and adapted to slide inside the hear ing 18 and engage with the main toothed clutch member 15 when slid rearwardly. The clutch member 32 projects from a cylinder which has clutch recesses 34 in its periphery for the teeth 22 and their stops 24 to engage with.

These recesses 34 have parallel ends arranged longitudinally of the starting shaft,

and have inclined front sides. .35arranged diagonally of the starting shaft. The start ing shaft is slidable longitudinally in its bearing 10, and it has a collar 36 secured on it to limit its forward travel. A starting crank, not shown, of any approved sort is a secured on the front end portion of the shaft 12 in front of its bearing 10.

When the engine is to be started, the starting shaft is revolved by hand in the direction of the curved arrow, after being slid rearwardly so that the teeth of the main clutch members 15 and 32 are in engagement with each other.

engine commences to work the engine shaft is revolved rapidly, and the inclined flanks of the teeth of the main clutch member 15 push the clutch member 32 forwardly so that the two main clutch members are disengaged automatically. The clutch teeth 22 are much longer than the teeth of the main clutch members, and after the engine has been started the starting shaft is revolved backwardly by hand until prevented by the stops The starting shaft re 'volves the engine shaft, and as soon as the parts of the stops so that the starting shaft slidable starting shaft, a clutch member seis slid forwardly, and the main clutch memcured on the starting shaft and slidable inv bers are placed at a safe distance from each side the said annular bearing into and out other. of engagement with the aforesaid clutch When the engine is being started the member, I a non-slidable ratchet toothed ratchet toothed wheel 21 is revolved by the wheel journaled on the annular bearing and long clutch teeth 22, and this ratchet wheel provided with means for preventing it from 21 and its pawls prevent the starting shaft revolving backwardly, a cylinder secured to and its crank from being revolved in the rethe slidable clutch, member and provided verse direction until the two main clutch with clutch tooth recesses of greater depth members have been slid out of engagement than the teeth of the said clutches, and relawith each other. tively long clutch teeth projecting from the When a back the takes place, the ratchet said ratchet wheel and sliding to a limited toothedwheel 21 is held from'revolving, in extent circumferentially and longitudinally the reverse direction to the arrow in Fig. 2, in the said recesses. by the pawls 27. The engine itself turns the 3. In an engine starter, an engine shaft, a shaft 9 in the direction of the arrow so that clutch member secured on the engine shaft, a the inclined teeth of clutch member 15 push slidable starting shaft, a clutch member setheteeth of clutch member 32 forwardly out cured on the starting shaft and'engaging of engagement with the clutch member -15. with the aforesaid clutch member, a station 39 This disengages the engine shaft 9 from the ary support, a ratchet wheel mounted to restarting" shaft 12. The inclined teeth or volve concentric with the said shafts, a pawl sides 35 of the recesses 34 are deeper than the carried by the said support and engaging teeth of the clutch members 15 and 32 so that with the said wheel, a cylinder secured to a safety clearance is provided which will the slidable clutch member and provided 5 allow the starting shaft-to turn backward with clutch tooth recesses, and relatively about one-eighth of a revolution and then long clutch teeth projecting from the said the stops 24 limit the movement. ratchet wheel and working in the said re- 1 A starting device constructed in this mancesses, said clutch teeth being provided with ner greatly reduces the chances of accidents stops at their points which engage with the in cranking up the engine of a motor car. ends of the said recesses and limit the cir- Such accidents are liable to break the arm of cumferential movements of the said teeth in the person who attempts to start the engine the recesses. r with the devices commonly used for that 4; In 'an' engine starter, an engine shaft, purpose. i i a clutch membersecured on the engine shaft What I claim is: and provided with an annular bearing and a 1. In an engine starter, an engine shaft, a circumferential rib, a clutch member secured toothed clutch member secured thereon, a on the starting shaft and slidable inside the slidable starting shaft, a toothed clutch, said annular bearing and engaging with the member secured on the starting shaft and aforesaid clutch memhen'a stationary hous- [00 adapted toengage with. the aforesaid clutch ing encircling the said rib, a ratchet toothed member a cylinder secured to the slidable whee]. journaled in. the housing on the's'aid clutch member .and provided with clutch annular bearing, a pawl carried by the said tooth recesses of greater depththan the teeth 1 housing *and engaging with the ratchet of the said clutch members, a non-slidable toothed wheel, a cylinder secured to the slid wheel mounted concentric with the said able clutch member and provided with clutcli clutch members and provided with rela-. tooth recesses, and relatively lon g clutch" tively long clutch teeth which slide to a teeth projectingfrom the ratchet toothed limited extent circumferentially and longi- 7 wheel and working in the said recesses.

tudinallyin thesaid recesses, and means for In testimony whereof I have affixed my 119 24 which strike the shorter ends of the recesses 34. The inclined front sides 35 of. the clutch recesses -bear against the inclined preventing the said wheel from revolving @signat'ure'.

2. In an engine starter, an engine shaft, a clutch member secured on the engine shaft and provided with an annular bearing, a

backwardly of the normal direction of revo lution of the engine Shaft, 'JUL'IEN DUQUETTE. 1 p 

